Polishing pads produced by an additive manufacturing process
First Claim
1. A method of forming a polishing article, comprising:
- dispensing a plurality of first droplets of a first liquid on a surface of a portion of a polishing body, wherein the surface comprises a first material formed by at least partially curing an amount of the first liquid;
exposing the plurality of first droplets to electromagnetic radiation to form a plurality of partially cured first droplets having contact angles of 50 degrees or more relative to the surface of the first materialdispensing a plurality of second droplets of a second liquid on the surface of the portion of the polishing body, wherein the plurality of second droplets are positioned adjacent to one or more of the first droplets; and
exposing the plurality of the second droplets to electromagnetic radiation to form a plurality of partially cured second droplets, wherein exposing the plurality of first droplets to electromagnetic radiation overlaps with exposing the plurality of second droplets to electromagnetic radiation.
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Accused Products
Abstract
Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
211 Citations
22 Claims
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1. A method of forming a polishing article, comprising:
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dispensing a plurality of first droplets of a first liquid on a surface of a portion of a polishing body, wherein the surface comprises a first material formed by at least partially curing an amount of the first liquid; exposing the plurality of first droplets to electromagnetic radiation to form a plurality of partially cured first droplets having contact angles of 50 degrees or more relative to the surface of the first material dispensing a plurality of second droplets of a second liquid on the surface of the portion of the polishing body, wherein the plurality of second droplets are positioned adjacent to one or more of the first droplets; and exposing the plurality of the second droplets to electromagnetic radiation to form a plurality of partially cured second droplets, wherein exposing the plurality of first droplets to electromagnetic radiation overlaps with exposing the plurality of second droplets to electromagnetic radiation. - View Dependent Claims (2, 3, 4, 5, 6, 11, 12, 13, 14, 15, 16, 17, 19, 21, 22)
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7. A method of forming a polishing pad, comprising:
forming a layer over a surface of a previously formed layer, wherein forming the layer comprises; depositing a plurality of first droplets of a first composition in a first pattern over one or more regions of the surface of the previously formed layer; depositing a plurality of second droplets of a second composition in a second pattern over the one or more regions of the surface of the previously formed layer; exposing the plurality of first droplets to electromagnetic radiation generated from a source to form a plurality of partially cured first droplets having contact angles of 50 degrees or more relative to the surface of the previously formed layer; and exposing the plurality of second droplets to electromagnetic radiation generated from the source to form a plurality of partially cured second droplets having contact angles of 50 degrees or more relative to the surface of the previously formed layer. - View Dependent Claims (8, 9, 10, 18, 20)
Specification